Privilege escalation in Avast and AVG Antivirus
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2022-4173 |
| CWE-ID | CWE-36 |
| Exploitation vector | Local |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software |
Avast Antivirus Client/Desktop applications / Antivirus software/Personal firewalls AVG Antivirus Client/Desktop applications / Antivirus software/Personal firewalls |
| Vendor | Avast Software s.r.o. |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Absolute Path Traversal
EUVDB-ID: #VU70525
Risk: Low
CVSSv4.0: 7.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]
CVE-ID: CVE-2022-4173
CWE-ID:
CWE-36 - Absolute Path Traversal
Exploit availability: Yes
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to insecure file path processing within the malware removal functionality. A local user can remove arbitrary files on the system and escalate privileges.
Install updates from vendor's website.
Vulnerable software versionsAvast Antivirus: All versions
AVG Antivirus: All versions
CPE2.3- cpe:2.3:a:avast_software_s.r.o.:avast_antivirus:*:*:*:*:*:*:*:*
- cpe:2.3:a:avast_software_s.r.o.:avg_antivirus:*:*:*:*:*:*:*:*
https://support.norton.com/sp/static/external/tools/security-advisories.html
https://i.blackhat.com/EU-22/Wednesday-Briefings/EU-22-Yair-Aikido-Turning-EDRs-to-Malicious-Wipers.pdf
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
